MULTIPIECE PISTON RING AND METHODS AND DEVICES FOR THE PRODUCTION THEREOF

Title:

MULTIPIECE PISTON RING AND METHODS AND DEVICES FOR THE PRODUCTION THEREOF

Document Type and Number:

WIPO Patent Application WO/2001/051833

Kind Code:

A1

Abstract:

The invention relates to engine engineering and can be used for producing a multipiece piston ring itself for internal combustion engines and also components thereof. The multipiece piston ring has optimised parameters of its components which make it possible to reduce fuel and motor oil consumption considerably and to increase the longevity of cylinder-piston group of the internal combustion engine. The inventive method for producing a chromium blade spiral piston ring and a method for producing tangential expanders make it possible to produce the chromium multipiece piston rings with a regular thickness chromium coating avoiding breakaway, chips and dendrites and to obtain a profile of the tangential expander with a softer spring characteristic. The inventive device for producing snake-like springs, the device for producing the profile of the tangential expander and coiling thereof in spiral with simultaneous quench and the device for cutting of and forming a lock inside the tangential expander have a very simple construction and offer high reliability.

Inventors:

ALEXANDROV ANDREI ALEXEEVICH (RU)
NEMETS RUSAAM SAMUILOVICH (RU)
STOLYAROVA ELENA NIKOLAEVNA (RU)
KARTASHOV LEONID MAXIMOVICH (RU)
MATVIEVSKAYA LJUDMILA IVANOVNA (RU)

Application Number:

PCT/RU2000/000421

Publication Date:

July 19, 2001

Filing Date:

October 26, 2000

Export Citation:

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Assignee:

ALEXANDROV ANDREI ALEXEEVICH (RU)
NEMETS RUSAAM SAMUILOVICH (RU)
STOLYAROVA ELENA NIKOLAEVNA (RU)
KARTASHOV LEONID MAXIMOVICH (RU)
MATVIEVSKAYA LJUDMILA IVANOVNA (RU)

International Classes:

B21F11/00; B21F35/04; B21F37/02; B21F45/00; B23P15/08; F16J9/06; F16J9/14; (IPC1-7): F16J9/06; B21D11/06; B21F11/00; B21F35/04; B21F45/00; B23P15/08

Foreign References:

FR2525282A1	1983-10-21
SU1726824A1	1992-04-15
SU311720A
US4176434A	1979-12-04
SU691231A1	1979-10-15
US3633260A	1972-01-11
SU1533091A1	1999-08-27
DE2243567A1	1974-01-31
US3739622A	1973-06-19
SU1349078A1	1990-05-30
US4365492A	1982-12-28

Other References: